Crossword Genius

Water source rancid, so flush (4-3)

Ross

I believe the answer is:

well-off

'flush' is the definition.
(thesaurus)

'water source rancid' is the subsidiary indication.
'water source' becomes 'well' (I've seen this before).
'rancid' becomes 'off' (I've seen this before).
'well'+'off'='welloff'

'so' is the link.

(Other definitions for well-off that I've seen before include "Financially comfortable" , "Rich; fortunate" , "Moderately rich" , "Fairly rich" , "Quite wealthy" .)

I've seen this clue in The Times.
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